Magazine pencil



J. STRAKA. MAGAZINE PENCIL. APPLICATION man OCT. 16. 1920.

Patented July 4, 19220 EAQLM:

JOHN STRAKA, OF CHICAGO. ILLINOIS, ASSIGNOR OF ONE-HALF TO JOSEPH R.LEVJ'IS,

I GE CHICAGO. ELLINOIS.

IVEAGAZINE PENCIL.

LelfZiL'i-lz.

Specification of Letters Patent.

llateiz'ited July at, 1922.

Application filed. October 16, 1920. Serial No. 417,432.

1 0 all whom it may cancer-n.-

Be it known that 1. Jon): S'rnAnA, a citizen of the present Governmentof Czecho- Slovakia, and a residentof Chicago. Cook County, and State ofIllinois, have invented certain new and useful Improvements in MagazinePencils, of which the following is declared to be a full. clear, andexact description.

This invention relates to pencils and among its objects are to providesimple automatic and improved mechanism for feed ing out the. lead whenthe point thereof has become worn down, or in case of breakage. Anotherobject is to provide reciprocating or endwise movable lead feedingmechanism in a pencil. Another object is to provide lead feedingmechanism arranged to feed out a measured'or given amount of lead eachtime the lead feeding mechanism is actuated. ()ther objects andadvantages will appear in the course of the following specification andwith all of said objects and advantages in vie\v, this inventionconsists in the several novel faltures of construction. arrangement andcombination of parts as will hereinafter more fully appear.

The invention is clearly illustrated in the accompanying drawing. inwhich Fig. 1 is a side elevation of a pencil, embodying a simple form ofthe present invention; Fig. 2 is a central. longitudinal sectionthercof:Fig. 3 is a detail cross section taken on line. 3 3 of Fig. 2; Fig. 4 isa detail cross scctiontakcn on line +-4 of Fig. 2; Fig. 5 is a detailcross section taken on line 55 of Fig. 2; Fig. 6 is a detail crosssection taken on line (3-6 of Fig. Fig. 7 is a. side elevation of acertain member of the lead feeding mechanism; Fig. 8 is a detail crosssection taken on line 88 of Fig. Fig. '9 is a detail cross section takenon line 99 of Fig. 7; F ig.'10 is a perspective view of a certain leadfeeding plunger and Fig. 11 is a side elevation of a certain leadfeeding tube. Figs. 2 to 11. inclusive, are upon a greatly enlargedscale.

Referring to said drawing, which illustrates a simple embodiment oftheinvention, the reference character 12 designates the casing or outershell of the pencil, having a tapering end 13 beyond which is the tip 14from which projects the point or end of the lead 15. The casing may beof cylin- (llljctll or hexagon form as is found desira e.

In said casing or shell 12 is fixedly secured a tube 16, which isaxially disposed with respect to the casing and extends from the end ofthe tapered part 13 to a suitable place in the casing, depending on thelength of leads to be used. and upon the form of magazine employed. Inthe form shown the tube 16 extends throughout the greater length of thecasing and is secured therein by centrally apertured walls 1T. 18. thatconform to the inner face of the casing and are held therein byfriction. If desired. the end 15) of the tube 16 may be closed as shown.although this is not material.

Slidably and rotatively mounted in said fixed tube 16 is a guide tube20. which projects into the tip 14 and is fixedly secured thereto. Theend 21 of the tube 20 is preferably reduced in diameter and its wall ismade thinner than the remainder of the tube and is split, as at 22. andthe split portions are bent slightly toward each other to provide aslight grip upon the lead 15 for the purpose of preventing the lead fromaccidentally dropping out of the tube 20.

ln said guide tube 20 is a plunger 23 which has a round or cylindricalpart 2% that fits in the bore of the tube. and its end engages theadjacent end of the lead 15. ()ne end of the plunger is flattened. as at25. and bent laterally of the part 24 so as to extend at an anglethereto. Said bent end portion 25 projects out through a lengthwiseextending slot 26 which is formed in the guide tube 20, and engages withteeth, tongues or rachet like elements 27 that are formed or providedupon the fixed tube 16. The normal inclination of said flat part 25 isgreater than that shown in Fig. 2, so that the tooth or ratchet elementwith which the plunger is in engagement, acts to depress the flat part25, thereby causing the plunger to bind perceptibly in the guide tube atthe places lettered a, b. The purpose of this is to provide suflicientfriction between the plunger and tube to prevent the plunger from beingjarred or accidentally disconnected from the teeth 27. Said teeth may beformed by slotting the tube 16 transversely as at 28, to leave the teethor tongues 27 between the slots. and the ends of the slots 28 aretapered as at 29, the purpose of which will appear later. Convenientlystock, having the slots formed therein, and

it is rolled up into tubular form. At the slottet partit is preferred tohave the 'tongues or teeth 27 made fiat and to have them extend in aplane substantially tangential to the cylindrical Wall of the tube 16.(See Fig. 9.) It will be observed that the extreme end of the fiat part25 of the plunger is arranged to engage with edge portions of the teeth.The plunger and lead are thereby positively held from being pushed backby pressure on the point of the lead.

To load the pencil, the uide'tube is with; drawn and a length of eadinserted into the guide tube through the tip. The flat end 25 of theplunger is then pressed back and the guide tube inserted into the fixedtube of the casing, with the flatbent part .of the plunger being made toenter on the side opposite the teeth or tongues. When fully inserted,the tip is turned in the proper direction to bring the flat bent end ofthe plunger into one of the notches between thetongues, and by turningsaid tipthe proper direction, said flat bent part in moving from theround part of the tube onto the fiat tongueor into, a notch will snapthereinto and notify the user that it is in place. To move the plungerend out of the notch, the tip is turned in the same direction therebycausing the plunger end to ride up the incline-d end of the slot.

To' feed a small portion of the lead out through. the tip. the tip ispulled outward far enough to bring the terminal end of the flat part 25of the plunger into the adjacent notch 29. On aceount of the frictionbetween the plunger and guide tube, the plunger moves with said tube andtip when the tip and tube are moved outward, and the lead consequentl ismoved outward in front of the plunger. The tip is then pushed backagainst the tapered end of the casing and the tube 20 is therewithpushed back, but the lunger is held against backward movement "y reasonof its engagement with the tooth or tongue of the fixed tube 16. Bypushin back the tip, it exposes the point or en that was advanced whenthe tip was-pulled outwardly audit the plunger was accidentally movedpast two or more teeth, the tip need not be moved back against thetapered end of the casing, but it may be moved only Dart way, so thatonly a slight part of the lead may be exposed, to guard against breaking it, it being understood that leads of vary small diameter may beused in connection with this pencil.

A supply of leads may be kept in the pencil for future use, and amagazine 30 is provided around the fixed tube to receive such leads, orthe magazine may be contained in the casing beyond the lead feedingmechanisnl'. As-shcwn, the wall 18 isformed with arcuate slot 31 throughwhich lead may be inserted into the magazine 30. The shell 12, tube 16,and walls 17, 13, form an annular like magazine that holds a largesupply of leads. A cover is provided to close the end of the casing andpreventthe escape of the leads, and said cover is constructed andarranged to hold a novel eraser support which will now be described.

Slidably and removably secured in the open end of the casing 12 isasleeve- 32, in which is fixedly secured a nut or threaded washer 33, inwhich is mounted a threaded stem 34, that is fixedly secured to a disc35, which is formed with barbs or sharp prongs that engage with therubber eraser 36. A cap or cover 37 is slidably and removably secured onthe protruding part of the sleeve 32 and incloses the eraser. lVhen theeraser is worn down it is given a few turns in the sleeve and thethreaded pin 34 thereby moved outward by reason of its threadedconnection with the nut 33. The end of the eraser is thereby moved outthrough the sleeve 32 to expose more of its body.

A clip 38 is provided for securing the pencil in the pocket of onesclothing and said clip has a shank 39 which extends in through a hole inthe casing and is frictionally held in place between the inner face ofthe casing and a sleeve 10, which is trictionally held in the casing.Said sleeve 40 may be formed integral with the end wall 18, if desired.

More or less variation of the exact details of construction is possiblewithout departing from the spirit of this invention: I desire,therefore. not to limit myself to the exact form of the constructionshown and described. but intend. in the following claims, to point outall of the invention disclosed herein.-

I claim as new, and Letters Patent:

1. A pencil comprising a casing, a stationary tube therein provided with.a row of plunger engaging elements, a reciprocatory tube slidablymounted in said station-. arv tube, a pencil tip fixedly secured to saidreciprocatory tube, beyond the casing, whereby said reciprocatory tubemay be actuated. and a lead feeding plunger frictionally held in saidreciprocatory tube and arranged to engage the plunger engaging elementsof the stationary tube.

2. A pencil comprising a casing, a stationary tube therein having a rowof teeth formed therein. a reciprocatory plunger actuating tube slidablymounted in said stationary tube, a pencil tip fixedly secured to saidreciprocatory tube, beyond the casing, whereby said reciprocatory tubemay be actuated, and a lead feeding plunger movdesire to secure by andhaving a laterally bent part engaging with the teeth of said stationarytube.

3. A pencil comprisinga casing, a stationary, transversely slotted tubecentrally disposed therein, a recipro-atory plunger actuating tubeslidably mounted in said stationary tube, a pencil tip fixedly securedto said reciprocatory tube, beyond the casing, whereby saidreciprocatory tube may be actuated, and a lead feeding plunger movablelengthwise, in said reciprocatory tube, and arranged to engage in theslots of said slotted tube.

4. A pencil comprising a casing, a stationary tube therein having a rowof teeth formed therein, a lengthwise slotted reciprocatory plungeractuating tube slidably mounted in said stationary tube, a pencil tipfixedly secured to said reciprocatory tube, beyond the casing, wherebysaid reciprocatory tube may be actuated, and a lead feeding plungerslidably mounted in said reciprocatory tube and having a laterallyextendin depressible part projecting through the s ot of saidreciprocatory tube and arranged to engage the teethof said stationarytube.

5.-A pencil comprising a -asing, a stationary transversely slotted tubetherein, a lengthwise slotted reciprocatory plunger actuating tubeslidably mounted in said stationary tube, a pencil tip fixedly securedto said i'eciprocatory tube, beyond the casing, whereby saidreciprm-atory tube may be actuated. and a lead feeding plunger slidablymounted in said reciprocatory tube and having a laterally extendingdepressible part projecting through the slot of said recipn catory tubeand arranged to engage in the slots of said stationary tube.

(3. A pencil comprising a casin a stationary, transversely slotted tubetherein, the ends of the slots being closed and one of the ends of theslots being inclined, a lengthwise slotted reciprocatory plungeractuating tube slidably mounted in said sta- ,tionarv tube, and a leadfeeding plunger slidably mounted in said reciprocatory tube and having alaterally extending depressible part projecting through the slot of saidreciprocatory tube and arranged to engage in the slots of saidstationary tube.

7. In a pencil, a fixed tube formed with transverse, closed slots andfiat tongues therebetween adapted for engagement with a depressible leadfeeding plunger.

8. In a pencil, a fixed tube, slotted t ans versely to form plungerengaging tongues. said tongues being flat and verlapping the adjacentedge of the tube, and the opposite ends of the slots being inclined.

JOHN STRAKA.

